(taxonomy) (Often abbreviated: s.s., s. str., sens. str. or sens. strict.) In the narrow sense. Added after a taxon to mean the taxon is being used in the sense of the original author, or without taxa which may otherwise be associated with it.

Relevant to Florida species is Thorne's inclusion of the Agavaceae and Amaryllidaceae in the family. The Liliaceae sensu stricto have been defined as having actinomorphic flowers, six stamens, and most importantly, a superior ovary.